Magnesium Oxide
Magnesia
- CAS
- 1309-48-4
- EC
- 215-171-9
- Food Code
- E530
- Sectors
- Pharma & Healthcare, Food & Nutrition, Water & Wastewater Treatment
Magnesium Oxide (CAS 1309-48-4) is an inorganic mineral salt that appears as a finely divided white powder, converts to magnesium hydroxide when hydrated, and serves as an antacid and dietary supplement ingredient, a refractory and ceramic raw material, and a treatment agent in environmental control and wastewater processing. It forms magnesium hydroxide upon hydration.
Typical Properties
| Molecular formula | MgO |
|---|---|
| Molecular weight | 40.3 g/mol |
| Appearance | Magnesium oxide forms a finely divided white particulate dispersed in air. |
| Form | nanopowder |
| Color | White |
| Odor | wh. powd. or cryst., odorless |
| Melting point | 2800 °C |
| Boiling point | 3600 °C |
| Density | 3.58 g/cm³ |
| Water solubility | 6.2 mg/L (20 °C), reacts |
| Flash point | 3600°C |
| pH | 10.3 (H2O, 20°C)(saturated solution) |
| GHS signal word | Warning · Irritant / harmful |
| HS code | 25199010 |
| Grades available | Food Grade, Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Magnesium Oxide
Applications
Used in refractories, rubber, ceramics, and fertilizers. In pharmaceuticals, it serves as an antacid and dietary supplement. It’s also applied in environmental control and wastewater treatment.
Safety & Risks
Low toxicity; avoid inhaling fine dust. Handle with respiratory protection.
Packaging
Supplied in 25 kg paper bags or 1,000 kg big bags. Store dry and sealed.